Right off the bat, I can think of two types of people who might be interested in a $350 case that turns the iPhone camera into a thermal imaging camera: ghost hunters and home inspectors. And if you’re a home inspector who moonlights as a ghost hunter, well here’s your next purchase.

While big-boy thermal imaging cameras can cost thousands, FLIR has shrewdly concluded that maybe not everybody has deep pockets and maybe having a pocketable thermal imaging camera with you at all times would be kind of cool.

The FLIR One case leverages a special app to grab heat signatures and detect temperatures, and what you see on the screen can be captured as photos and video just like you’re using the iPhone’s built-in camera app.

The case itself doesn’t add too, too much bulk considering the functionality it adds, and it doubles as a backup battery if your iPhone battery runs low. A FLIR rep told me the battery pack will last four hours for powering the thermal camera, or you can re-route the power to your iPhone instead.

Look for this in the spring. There will be Android options available closer to the end of the year, too.